What is CVE-2025-10535?

CVE-2025-10535 is a high-severity vulnerability in Mozilla Firefox, classified under Information Disclosure. CVSS score: 7.5/10. Published 2025-09-16.

How severe is CVE-2025-10535?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2025-10535 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Information disclosure in Mozilla Firefox

CVE-2025-10535

Information disclosure, mitigation bypass in the Privacy component in Firefox for Android. This vulnerability was fixed in Firefox 143.

Vulnerability class: Information Disclosure

EPSS: 0.003 (21.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Mozilla Firefox — versions 143

Weakness classification (CWE)

CWE-200 — Information Disclosure

Public proof-of-concept exploits

References

security@mozilla.org (Broken Link)
security@mozilla.org (Vendor Advisory)

Frequently asked questions

What is CVE-2025-10535?: CVE-2025-10535 is a high-severity vulnerability in Mozilla Firefox, classified under Information Disclosure. CVSS score: 7.5/10. Published 2025-09-16.
How severe is CVE-2025-10535?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2025-10535 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.